Answer Happy

What is a main benefit of relational databases? O Declarative querying: to be able to specify what a query result should look like rather than having to program on how to compute it. O Efficient execution of iterative algorithms over large data sets. O The possibility to efficiently store and analyse unstructured multimedia data such as images or videos. O Schema declaration via the graphical notation of the entity-relationship model. O The flexibility because you do not need to define a schema before data can be stored in a database.